Fosroc Conplast SP430 Superplasticiser Concrete Admixture
A high-range, chloride-free water-reducing admixture engineered to boost concrete workability, strength and durability. Supplied genuine, with technical support and fast delivery across India by Space Arc Engineering.
What is Fosroc Conplast SP430?
Conplast SP430 is a premium high-range water-reducing superplasticiser from Fosroc, formulated for concrete that demands high workability without sacrificing strength.
Fosroc Conplast SP430 is a chloride-free, high-performance superplasticising admixture based on selected sulphonated naphthalene polymers. It is supplied as a brown solution that disperses instantly in water, making it ideal for producing flowing, easily placed concrete with a significantly reduced water-cement ratio.
By allowing site engineers and ready-mix producers to cut mixing water while maintaining slump, SP430 delivers denser, stronger and more durable concrete. It is widely specified across India for high-strength structural work, pumped concrete and pre-cast production where consistency and finish matter.
- Chloride-free — safe for reinforced and prestressed concrete
- Compatible with all types of Portland and blended cements
- Improves cohesion and reduces segregation and bleeding
- Ideal for hot-weather concreting common in Indian conditions
Key Features of Conplast SP430
Every feature is designed to give your concrete a measurable performance edge on site.
High Water Reduction
Reduces mixing water by up to 15–25% while retaining workability, lowering the water-cement ratio for stronger concrete.
Chloride Free
Completely free of added chlorides, making it fully safe for reinforced, prestressed and post-tensioned concrete.
Instant Dispersion
Disperses rapidly in the mix, producing uniform, high-slump flowing concrete that is easy to place and pump.
Higher Early Strength
Enables faster formwork stripping and quicker construction cycles thanks to improved early and ultimate strength gain.
Improved Cohesion
Minimises segregation and bleeding, giving a superior surface finish and dense, homogeneous concrete.
Hot Weather Ready
Maintains slump and workability in high ambient temperatures — ideal for Indian summer concreting conditions.
Engineering Benefits That Add Up
The dispersing action of SP430 releases water trapped between cement particles, allowing a lower water demand for the same slump. The result is a tangible improvement in both fresh and hardened concrete properties.
- Increased compressive and flexural strength at all ages
- Reduced permeability for better durability and longer service life
- Lower risk of shrinkage cracking through reduced water content
- Excellent pumpability for high-rise and long-distance placement
- Cost savings from optimised cement content in the mix design
SP430 vs Ordinary Concrete Mix
See how a Conplast SP430 admixed mix outperforms plain concrete on the parameters that matter most.
| Parameter | Plain Concrete | With Conplast SP430 |
|---|---|---|
| Workability / Slump | Low | High & Flowing |
| Water-Cement Ratio | Higher | Reduced up to 25% |
| Compressive Strength | Standard | Significantly Higher |
| Durability & Density | Average | Superior, Low Permeability |
| Pumpability | Difficult | Easy & Consistent |
| Chloride Content | Varies | Nil (Chloride Free) |
Where Conplast SP430 is Used
Trusted across infrastructure, commercial and industrial projects throughout India.
High-Rise & RCC Structures
Ready-Mix Concrete (RMC)
Pre-Cast Concrete Elements
Bridges & Infrastructure
Pumped & Flowing Concrete
Water-Retaining Structures
Recommended Concrete Grades & Mixes
M20 – M60+ Grades
Ideal for standard to high-strength structural concrete requiring reliable workability.
Pumpable Concrete
Perfect for concrete that must be pumped over long horizontal or vertical distances.
OPC & Blended Cement
Fully compatible with OPC, PPC, PSC and other blended cement systems.
Dense / Low-Permeability
For durable concrete in aggressive or water-retaining environments.
Conplast SP430 Dosage Guide
Typical dosage ranges are shown below. Optimum dosage should always be established by site trials for your specific mix design.
| Application | Typical Dosage (per 100 kg cement) | Effect |
|---|---|---|
| Normal Water Reduction | 0.5 – 1.0 litre | Improved workability, moderate strength gain |
| High Water Reduction | 1.0 – 2.0 litres | Maximum strength & durability, low w/c ratio |
| Flowing / Pumped Concrete | 1.0 – 2.5 litres | High-slump self-levelling flow |
*Dosages outside this range may be used based on trials and technical guidance. Talk to our technical expert for a tailored recommendation.
How to Use Conplast SP430 Correctly
Step-by-Step Method
- Add SP430 to the concrete during or after the water has been added to the mix.
- Do not add the admixture to the dry aggregate or cement alone.
- Mix thoroughly for a further 2–3 minutes to achieve uniform dispersion.
- Conduct site trials to fine-tune dosage and confirm slump retention.
- Never exceed recommended dosage without prior technical consultation.
Technical Specifications
| Property | Typical Value |
|---|---|
| Appearance | Brown liquid |
| Base | Sulphonated naphthalene polymers |
| Chloride Content | Nil (chloride free) |
| Air Entrainment | Negligible |
| Standards | Complies with IS 9103 & ASTM C494 |
Packaging
Available in convenient 5 litre & 20 litre cans and 200 litre barrels for bulk site and RMC requirements.
Storage & Shelf Life
Store in a cool, dry, shaded place in sealed containers. Shelf life of up to 12 months when stored correctly.
Compatibility
Compatible with all Portland & blended cements. Do not pre-mix with other admixtures; add separately to the mix.
Safety Precautions
Non-toxic and non-flammable. Wear gloves & goggles; rinse skin/eyes with water on contact. Keep away from children.
Download TDS & SDS
Access the official Technical Data Sheet and Safety Data Sheet for Fosroc Conplast SP430.
Your Authorised Fosroc Platinum Distributor
As an authorised Platinum distributor of Fosroc construction chemicals, Space Arc Engineering delivers more than just products — we deliver certainty.
Genuine Products
Every batch of Conplast SP430 is 100% authentic Fosroc, sourced directly to guarantee quality and warranty.
Technical Support
Our engineers provide mix-design guidance, dosage optimisation and on-site troubleshooting.
Fast Delivery
Efficient logistics ensure your admixture reaches site on schedule, avoiding costly delays.
Bulk Supply
Reliable bulk and project-quantity supply for RMC plants, contractors and infrastructure works.
Expert Recommendations
Get the right Fosroc product for your application with unbiased, experience-backed advice.
PAN India Support
Project support and supply across India, from metros to remote infrastructure sites.
How to Buy Fosroc Conplast SP430 in India
A quick guide to ordering the right quantity at the best price with full technical backing.
1. Confirm Your Requirement
Share your concrete grade, volume and application so we can recommend the correct dosage and pack size.
2. Get a Genuine Quote
Receive transparent, competitive pricing on genuine Fosroc SP430 with GST invoice and delivery timeline.
3. Delivery & Support
We dispatch promptly and stay available for technical support throughout your project lifecycle.
Frequently Asked Questions
What is Fosroc Conplast SP430 used for?
Conplast SP430 is a high-range water-reducing superplasticiser used to produce workable, high-strength and durable concrete. It is ideal for RCC structures, ready-mix concrete, pre-cast elements, pumped concrete and infrastructure projects where a low water-cement ratio and good flow are required.
What is the recommended dosage of Conplast SP430?
Typical dosage ranges from 0.5 to 2.5 litres per 100 kg of cement depending on the level of water reduction and workability required. The optimum dosage should always be confirmed by site trials for your specific mix design. Our technical team can help you determine the ideal dosage.
Is Conplast SP430 chloride free?
Yes. Conplast SP430 is completely free of added chlorides, which makes it safe for use in reinforced, prestressed and post-tensioned concrete without any risk of corrosion to steel reinforcement.
What is the shelf life of Conplast SP430?
When stored in sealed original containers in a cool, dry and shaded place, Conplast SP430 has a shelf life of up to 12 months from the date of manufacture.
Can I buy genuine Fosroc Conplast SP430 in India?
Absolutely. Space Arc Engineering is an authorised Platinum distributor of Fosroc construction chemicals and supplies 100% genuine Conplast SP430 across India with technical support, fast delivery and bulk-supply options. Request a quote to get started.
What packaging sizes are available?
Conplast SP430 is available in 5 litre and 20 litre cans as well as 200 litre barrels, making it suitable for both small site requirements and large bulk or ready-mix concrete applications.
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